Workaround to handle PSR-4 && WordPress Coding Standards at same time

.phpcs.xml

<?xml version="1.0"?>
<ruleset name="CS">
    <description>PHPCS example</description>
    <config name="testVersion" value="5.6-"/>
    <exclude-pattern>vendor/*</exclude-pattern>

    <arg value="ps"/>
    <arg name="colors"/>
    <arg name="parallel" value="100"/>
    <arg name="extensions" value="php"/>
    <arg name="cache" value=".phpcs.cache"/>

    <rule ref="WordPress">
        <!-- PSR4 -->
        <exclude name="WordPress.Files.FileName" />
    </rule>

    <rule ref="WordPress-Extra"/>

    <rule ref="WordPress-Docs"/>

</ruleset>